| The article studies on the new words since the reform and open. It explains the cognitive condition, the basis, the form, the clue,and interprets the principle in detai in the whole process of the derivation and development from the perspective of Cognitive Linguistics and Economics of Language with introspective and interdisciplinary method. Except for conclusion, the article is divided into six chapters:The first chapter defines the term"new words"and outlines it's research history and the status.The second chapter explains the cognitive conditions——context and experience in the process of its'derivation and development, and analyzes the cognitive conditions with the context's attribute, the inner restricts and the existing experience.The third chapter explains the cognitive basis——category and prototype in the process of its'derivation and development . The prototype is the most representative thing in a category, other things are thought of falling into the same category as they possess the family similarities as the prototype. So people think the categorization of the concrete things develops from the core of the prototype .The fourth chapter explains the cognitive form——metaphor and metonymy in the process of its'derivation and development. People have been recognizing and creating new things since the reform and open increasingly. When the thought developed to a certain stage, people would not be satisfied with the cognition and expression of the concrete things, but recognize, consider, express some abstract concepts and thoughts, so metaphor and metonymy are necessary at the moment.The fifth chapter explains the cognitive clues——association and analogization in the process of its'derivation and development, which are used to construct the new words under the psychological mechanism of metaphor and metonymy.The sixth chapter explains the cognitive principle——the principle of least effort in the process of its'derivation and development. It runs through the whole process of the derivation and development of new words. |